The first part introduces not only the necessity and possibility of image compression but also the basic principle and method of image compression.
第一部分，论述了图像压缩的必要性和可行性，并重点介绍了图像压缩的基本原理和方法。
First the characteristic, contents and demand is analyzed, and then method and project principle of the water conservancy information system is determined.
首先，系统分析了水利信息发布系统的特点、内容和要求，确定了水利信息发布系统的设计方法以及设计原则。
Moreover, the feasibility of brittle-ductile transition of monocrystalline Silion is studied with the method of first principle stress.
并用第一原理应力计算方法对单晶硅纳米切削过程中的脆塑转变的可行性进行了研究。
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